[FIXED] Grid data not rendered in TabPanel on none active tab

in a TabPanel data of a grid is currently not rendered if I reload the data from my backend and the tab thats the container of the grid is not the activeTab. If it´s the activeTab data is rendered correctly.

Have a look at the following example.
When "First tab" is active and I press the "Refresh" button the new data is not rendered in the grid of "Second tab". The initial store.loadData inside initComponent works fine.